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Quadrilateral ABCD is cyclic and satisfies
MATHEMATICS · Subjective · CBSE · Mathematics · Circles · Circles
Problem
Quadrilateral ABCD is cyclic and satisfies
∠
A
+
∠
C
=
180
∘
\angle A+\angle C=180^{\circ}
∠
A
+
∠
C
=
18
0
∘
. Explain briefly why
∠
B
+
∠
D
\angle B+\angle D
∠
B
+
∠
D
is also
180
∘
180^{\circ}
18
0
∘
.
Related theory
Cyclic Quadrilaterals
Circles
Cyclic quadrilateral properties
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